Cannabis, which is a class B drug, was the most seized by Scottish police forces with a total of 21,169 seizures. There were 3,277 diazepam (class C) seizures; 2,329 heroin (class A) seizures and 2,140 cocaine (class A) seizures.

More cannabis plants were seized in 2012-13 than in 2011-12

Seizures involving more than one drug count as a single seizure but are counted separately against each individual drug or drug class involved.

Community Safety Minister Roseanna Cunningham said: "The fact that drug taking among the general adult population has fallen since 2006 and drug use among young people is at its lowest levels since 2002, shows that progress is being made.

"Nevertheless, as today's figures show, we must continue to do all we can to keep up the fight against this illegal trade and the misery which this can cause."